I quickly go through Int32 struct definition, and I do not find any overload to operators like + - * /, but for String class, we can directly find them. How does Int32 implement such feature?
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2It is built into the language. Also the basic reason why you cannot write generic code that uses those operators. – Hans Passant Aug 02 '16 at 07:31
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@HansPassant I see, thanks – Bargitta Aug 02 '16 at 07:51
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They are baked into the CLR, and are not part of the code outputted as Reference Source. Hence you can't find them.
For String, only two operators are visible: those written in C#. Those in the CLR are also not shown (like the + operator).
Patrick Hofman
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